70% of the time whenever I slow below, say, 5 mph my OSF parking sensor give 5 wihites and one or two reds and beep, beep, beep etc when there is nothing there whatsoever. It can repeat and repeat, still with nothing there. Drives one crazy so, switch off, but then why have it? Dealer said loose number plate but made no difference. Now says stone chip on two sensors so will need renewing at my expence. Says Tier One warranty does not cover the problem yet, when buying the car, I was told it was 99% of a new car warranty! Anyone got any ideas or experience please?